If you're in the market for exotic treatments of the semi-masochistic variety, India will happily provide. If you'd rather just loll around in an infinity pool on the grounds of an 18th-century palace with clear views of the Himalayas, that can also be arranged. The best spa destinations here are utterly unique experiences that combine ancient therapies with cutting-edge amenities.
Uniting all of them is the philosophy of Ayurveda. This 5,000-year-old school of thought has been practiced for generations, across thousands of ashrams. And it's still the lifeblood of the leading spas found across the Subcontinent.